| 摘要 |
The invention relates to an actuating device that actuates engine valves, comprising magnetizing means, a spring having a fixed end connected to an adjustable stop and having a moving end connected to the valve ( 1 ). The adjustable stop comprises meshing means ( 26 ) that can interact with a control element ( 8, 10 ) whereby enabling the tare of the spring to be adjusted, and comprises an orifice ( 11 ) located between the adjustable stops of the two valves ( 1 ) of the same pair and serving to accommodate the control element ( 8, 10 ). The invention is characterized in that the control element ( 8, 10 ) comprises positioning means ( 12 ) that interact with complementary means ( 13 ) whereby making it possible to locate two stable positions respectively corresponding to the meshing positions with the two adjustable stops of the two valves ( 1 ) and to immobilize the control element ( 8, 10 ) in these positions.
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